77660901 has 12 divisors (see below), whose sum is σ = 112257600. Its totient is φ = 51736680.

The previous prime is 77660893. The next prime is 77660909. The reversal of 77660901 is 10906677.

It is an interprime number because it is at equal distance from previous prime (77660893) and next prime (77660909).

It is not a de Polignac number, because 77660901 - 2³ = 77660893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77660909) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16836 + ... + 20946.

It is an arithmetic number, because the mean of its divisors is an integer number (9354800).

Almost surely, 2^77660901 is an apocalyptic number.

It is an amenable number.

77660901 is a deficient number, since it is larger than the sum of its proper divisors (34596699).

77660901 is a wasteful number, since it uses less digits than its factorization.

77660901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6216 (or 6213 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 36.

The square root of 77660901 is about 8812.5422552178. The cubic root of 77660901 is about 426.6458002355.

The spelling of 77660901 in words is "seventy-seven million, six hundred sixty thousand, nine hundred one".